Grumman FM-2 Wildcat in UK markings, C/n 5833, built by General Motors, at "Airsho" Midland Texas.
The Wildcat was not elegant, but it was clean, straightforward, and built very rugged, confirming Grumman's reputation with pilots as the "Iron Works". The Grumman motto was: "Make it strong, make it work, make it simple." Engineers were encouraged to overdesign the machines, ensuring they exceeded Navy requirements by what was called a "Schwendler factor". The cockpit was designed to be the last thing to fail to help make sure pilots got back home safe.
Canadian Aviation Blog